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Sidekick vs Msty: catalog facts
Sidekick	Msty
Free Free to download from GitHub.	Freemium A free tier of the desktop workspace is available. Larger workspace features require a…
macOS	Windows, macOS, Linux
Native macOS interface Answers using your own files, folders and websites	It runs local models without a separate server install and keeps chats, prompt libraries and attached knowledge bases…
macOS only Answer quality depends on the local model and your hardware	The application is closed source, and the more capable workspace features sit behind a paid plan.
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.